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ionic_dv_ctx_get_udma_count(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | ARGUMENTS | RETURN VALUE | SEE ALSO | AUTHORS | COLOPHON 

IONIC_DV...DMA_COUNT(3) Ionic Programmer’s Manual IONIC_DV...DMA_COUNT(3)

NAME         top

       ionic_dv_ctx_get_udma_count - Get number of UDMA pipelines

SYNOPSIS         top

              #include <infiniband/ionic_dv.h>

              uint8_t ionic_dv_ctx_get_udma_count(struct ibv_context *ibctx);

DESCRIPTION         top

       ionic_dv_ctx_get_udma_count() returns the number of UDMA pipelines
       available on the ionic device associated with ibctx.

       UDMA pipelines are independent data paths through the device.
       Queues can be assigned to specific pipelines using
       ionic_dv_pd_set_udma_mask(3) on a protection domain before
       creating the queues.

ARGUMENTS         top

       ibctx  The device context to query.  Must be an ionic device
              context.

RETURN VALUE         top

       Returns the number of UDMA pipelines available on the device.
       Returns 0 if ibctx is not an ionic device context.

SEE ALSO         top

       ionicdv(7), ionic_dv_ctx_get_udma_mask(3),
       ionic_dv_pd_get_udma_mask(3), ionic_dv_pd_set_udma_mask(3)

AUTHORS         top

       Advanced Micro Devices, Inc.

COLOPHON         top

       This page is part of the rdma-core (RDMA Core Userspace Libraries
       and Daemons) project.  Information about the project can be found
       at ⟨https://github.com/linux-rdma/rdma-core⟩.  If you have a bug
       report for this manual page, send it to
       linux-rdma@vger.kernel.org.  This page was obtained from the
       project's upstream Git repository
       ⟨https://github.com/linux-rdma/rdma-core.git⟩ on 2026-08-04.  (At
       that time, the date of the most recent commit that was found in
       the repository was 2026-07-22.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there is
       a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

ionic                           2025-06-23        IONIC_DV...DMA_COUNT(3)

Pages that refer to this page: ionic_dv_ctx_get_udma_mask(3),  ionic_dv_pd_get_udma_mask(3),  ionic_dv_pd_set_udma_mask(3),  ionicdv(7)

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